drag audio file to daw

[ulrik]

I have a plugin that load a user audio file which you can slice into custom parts and sizes.
The plugin operates on the buffer and it can process the audio using the stretch player node (speed & pitch) for direct playback synced to the daws tempo.

There is a "drag audio to daw" function which takes the buffer inside the stretch player node and saves it to a temp audio file on the hard drive which then gets imported in to the daw.

It works nicely
However the dragged file is not manipulated by the stretch player, instead it is the "original file", how can I get the buffer that's been manipulated by the node?
Do I have to record it, or is there some way to just grab the manipulated buffer and save it as an audio file?

Is it possible to make a render in the background that includes the modified buffer?
Any help is appreciated